We're growing plants, not reptiles, and there is more to "UV" than just UVB – which itself is not a defined single point on the spectrum, but covers a range of wavelengths with different properties.
Not mine, mate. My diodes are mostly made in Japan and have THE most efficient UVA diodes available (NVSU219C).
Maybe not yours then, but many if not most of the other brands I see have cashed in on using the cheap diodes for awhile now. Now they even admit it doesn't do anything, unless you buy the bars instead, right?
Even then, its not gonna output anywhere near what you could get with a cheaper retpile T-5 HO bulb setup, that actually has real UV output, not just the weak end of the UV spectrum. t-5 is king as far as UV output.
"NVSU219C" only found less than 10.. well 36, if you count the omitted results, across the entire world wide web via google web search. I only have your word to go by... other than spec sheets mostly in Japanese. I'll just have to take your word for it then?
I understand, we're growing plants. Many people have been using reptile equipment to supplement plants for years anyway. Now they have insane UV t-5 bulbs that output like 25/75% made just for growing.. Why are they even making those bulbs if LED is so good?